Saw-filing machine.



H. I, HANSON; SAW FILING MACHINE.

APPLlcATIoN FILED APR. 8. |916.

Patented Dec. 5,1916.

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H. I. HANSON.

SAW FILING IVIACIIIIIE. APPLICATION FILED Ams, 19m.

Patented Dee. 5,1916.l

2 SHEETS-SHEET 2.

affiliati/ lill-lill STS A FFlQ.

I-IJALMAR I. HANSON, OF SUMMIT, SOUTH DAKOTA.

SAW-FILING MACHINE.

T0 all whom t may concern:

Be it known that I, HJALMAR I. l-IANsoN, a citizen of the United States, and a resident of Summit, in the county of Roberts and State of South Dakota, have invented a certain new and useful Improvement in Saw- Filing Machines, of which the following is a specification. j

One of the principal objects of my present invention is to provide a saw filing machine of the general type disclosed in my Patent Number 1,165,248, of December 21, 1915, having an improved vise or saw clamp for holding the saw against vibration.

Another object contemplates the provision of an improved means for feeding the carriage along the supporting frame automatically.

Still another object is to provide means for automatically adjusting the device to acquire the proper depth of cut.'

Still another object is to provide means for correctly positioning the saw longitudinally of the device as it is from time to time shifted to present new teeth to be cut, whereby the teeth when the filing operation is entirely completed, will be of absolutely equal distances apart.

lVith these and other objects in view which will become apparent as the description proceeds, the invention resides in the construction, combination, and arrangement of parts hereinfater more fully described and claimed, and illustrated in the accompanying drawings in which like characters of reference indicate like parts throughout the several iigures, of which- Figure 1 represents a view in perspective of an improved saw filing machine constructed according` to my invention. Fig. 2 represents a front elevational view thereof, partly in section. Fig. 3 represents a view in section taken vertically and transversely through the filing machine. Fig. 4 represents a top plan view of the device.. Fig. 5 represents a view in section taken -vertically and longitudinally through a section of the feed rod and a portion of the feeding mechanism. Fig. 6 represents a fragmentary view in perspective of one end of the device, showing the means for mounting the feed rod and the frame, the parts being shown in separated position. Fig. 7 represents a view in section, taken vertically and transversely on the plane indicated by the line 7-7 of Fig. 2.

Specification of Letters Patent.

Application filed April 8, 1916.

Patented Dec. 5, 19146.

serial No. 89,994.

neath the object for securely clamping the machine in place thereon. From the ends of plate 5 rise standards 9 which at their forward portions project out beyond the plate and are provided with vertical cuts or recesses 10 for receiving the edge of a saw. The standards are also provided with horizontally extending recesses 11 having floors 12 (see Fig. 6) which are inclined with respect to the adjacent straight edge of the plate 5. These recesses 11 are designed for the reception of enlarged ends 13 formed on a bar 14. rllhese ends 13 have inclined outer faces 15 adapted to coact with the inclined floors 12 of the recesses 11 in producing a cam action whereby, when the bar 1st is moved in one direction to shift said bar lat erally toward the plate 5 to clamp a saw blade between said bar and plate, in the manner indicated in Fig. 3. In order that the bar 1.4L may be shifted at will., it is provided adjacent one end with a lever 16 having a cam head 17 adapted to coact with the adjacent standard 9 in such manner as to effect longitudinal movement of the bar 111, when the lever 16 is thrown downwardly, in order that said bar may at the same time be shifted laterally into clamping position.

The standards 9 are provided at their upper ends with eyes 18 for receiving pins 19 upon whose outer squared ends 2() are mounted the eyes 21 provided at the inner ends of arms 22 of the supporting frame. These eyes 21 are provided with squared openings through which the squared portions 2() of pins 19 extend so that the pins turn as the arms 22 are moved upwardly or downwardly. The outer ends of the arms 22 carry the guide rod 23 of the supporting frame, which rod lies in parallel relation with the feed rod 24 which is supported 0n the inner ends of the pins 19 and between the standards 9. This feed rod 24 is pro vided with sockets in its ends for receiving the rounded portions of pins 19. The

standards 9 are equipped with set scews 25 positioned in the eyes 18, which screws may be turned down into engagement with the pins 19 for maintaining them against rota- Y tion at will whereby to retain the supporting frame in adjusted angular relation with vrespect to the saw being worked upon, so that the angular inclination of the tile, indicated at 26, may remain constant.

The carriage, as set out inV my before mentioned patent, includes a plate 27 reciprocably supporting the iile holder and having an adjustable connection indicated generally at 28 with the rod 23 whereby the carriage may be adjusted in angular relationV with respect to the supporting frame. The le holder includes a pair Vof parallel rods 29 xed to the end pieces or plates 30, to one of which an inwardly extending bored arm 32 is secured. rlhe opposite end piece receives the rotatable handle 33 having a triangular opening in which one end of the ile 26 is received, the opposite end of the file being received in a socket 34 arranged in the bored arm 32. The handle 33 is retained in adjusted position by means of a set screw 35, and the handle is equipped with .means described Vin the patent before mentioned, for determining the proper angular adjustment of the file 26. The feed rod 24 is provided with a plurality of series of spaced recesses or indentations 34, which series run longitudinally of the rod, as set out in my former patent. The series individually have their recesses equally spaced one from the other, and the spaces between the indentations of the varions series differ. Each series of indentations is intended to correspond lwith the number of teeth in a saw of a certain size or standard.

'The feeding device forming one of the improvements in the present case, includes a traveler 35 Vslidably arranged upon the rod 24 and provided with an upstanding stem 36 over which a collar 37 formed on the plate 27 slidably engages. lVithin the stem 36 which is hollow, is arranged a pin 38 having a reducedupper portion 39 which extends through the upper closed end of the stem 36 and valso through the upper closed end of the collar 37, a cross pin 40 being carried by the upper reduced portion 39 of the pin, which cross pin rests upon the upper yclosed end of the collar 37. The lower reduced portion 41 of pin 38 is adapted to engage in the openings in the uppermost series on the rod 24. A. spring 42 interposed between the shoulder provided at the meeting points of pin 38 and its upper reduced portion 39, and the upper closed end of the stem 36, serves as means for normally maintaining the pin 38 in downward position. To raise the Vpin out of the opening with which it engages, it is necessary that the saw filing device be raised whereby to withdraw the pin against the tension of the spring 42. The t aveler 35 has a bell crank lever 43 pivotally mounted on its outer face, as at 44, and the upper arm of the lever lies beneath the adjacent end portion of the plate 27. The lower arm of the lever is pivotally connected as at 45 with a link 46 which is carried by a block 47 slidably mounted on the rod 24. The block is provided in its upper portion with a recess within which is pivotally mounted a. detent 48 having a downwardly extending tooth 49 alining with the lower reduced portion 41 of the pin 38, and adapted to engage in the same series of openings or recesses 34. The block 47 carries an arm 50 disposed below and in parallel relation with the rod 24, and this arm slidably extends through openings provided in spaced depending lugs 51 formed on the traveler 35. Between a cross pin 52, and the remote lug 51, there is arranged upon the rod a coiled spring 53, against whose tension the block 47 must operate when it moves toward the traveler 35.

rPhe operation of this feeding mechanism may be briefiy described as follows: Assuming the parts to be in the position indicated in Fig. 2 with the file just starting a downward cut, it is apparent that, as the file slowly moves downwardly, the bell crank lever 43 will be shifted downwardly by reason of the plate 27 engaging upon the upper arm of the lever, and thus, through the medium of the link 46, the block 47 will be slowly drawn against the tension of the spring toward the traveler As this movement of the block continues the tooth 49 which is carried by the detent 48, and which as will be noted is beveled, will move upwardly out of the recess in the file 24 with which it is in contact, and will move over the surface of the iile longitudinally thereof until it alines with the next succeeding recess in the series. At this time the detent 48 will be moved downwardly through the action of the spring 54 with which' it is equipped, as indicated in Fig. 5, the tooth 49 thus dropping into the next succeeding recess. At this time the file will have moved to its lowermost position, and when the handle is grasped and the ile holder moved upwardly, the pin 38 will be lifted against the tension of the spring 1l-2 out of its recess and immediately the spring 53 in seeking expansion, will move the traveler 35 along the rod 24 until the next succeeding recess in the series will be alined with thepin 38, at which time the spring 42 will move the pin downwardly in the recess so as to stop the progress of the traveler. The parts will then again be in the position indicated in Fig. 2, and the file will have moved a distance equal to the distance apart of the adjacent teeth in the saw. As this operation continues, the file carriage moves from one end of the device to the other, the file being automatically spaced and fed along at each instance a distance equal to the distance between the teeth in the saw, so that uniform work may be done.

lt may be here noted that the rod 24 is eccentrically mounted upon the pins 19, so that the device will be automatically adjusted to acquire the proper depth of cut in any particular case. That is, the rod is so mounted eccentrically that when the series in which the indentations are the closest together are uppermost on the rod, the latter is at the height of its adjustment, since the teeth in saws having a great number of teeth to the inch are relatively shallow. On the other hand when the rod is at the lower' end of its range of adjustment, the series in which the indentations are farthest apart will be uppermost on the rod, since a saw having teeth corresponding in number to the number' of indentations on the rod have relatively deep teeth. The intermediate series of openings are so arranged or positioned circumferentially of the rod as to determine the proper depth o-f the cut to be made by the file in sharpening the saws, as will be readily understood.

One of the uprights 9 is provided in its outer face with a recess in which one end of a short rod or arm 56 is pivoted. Mounted for rotation upon this rod or arm is a4 wheel 57 upon whose periphery a number of pairs of teeth 58 are formed. Ilhe pairs of teeth 58 are numbered to correspond with the manner in which the series of recesses 34 are numbered. The members of each pair of teeth 58 are reversed, but they are nevertheless of the saine dimensions and sizes one as the other. lThe object of the device just described is to properly position the saw longitudinally of the saw filing machine, as it is from time to time shifted along to expose unfiled teeth to the machine. rlhus, after the teeth adjacent the handle of thesaw have been dressed, the filing device in the meantime having moved from one end of the machine to the other end thereof, the clamping device is undone and the saw is shifted so as to present chilled teeth to be filed. Let us assume that series number 5 of the opening 34 is uppermost and is the one controlling the spacing of the file 26. Then when the file is shifted, one of the pair numbered 5 of the teeth 58 will be dropped into one of the'liled teeth of the saw, and the latter properly adjusted to snugly abut against the tooth of the number 5 pair, and the clamp will then be tightened. It will be found that the saw is thus properly positioned, so that th-e file will just fit into the uniled teeth. Thus, this device operates in engaging the dressed teeth of the saw to properly position the latter with respect to the filing device. rlh-e members of each pair of teeth 58 are arranged in opposite directions, so that the saw may properly be adjusted when it is reversed, as will be readily understood.

Although l have described the preferred embodiment of my invention, I may desire to make such changes in the construction, combination, and arrangement of parts thereof, as do not depart from the spirit of the invention and the scope of the appended claims.

l claim l. ln a saw filing machine, the combination of a file holder supporting plate, a feed rod having a series of indentations extending' longitudinally thereof, a traveler slidably mounted on the rod and having a hollow upwardly extending stem, a collar carried by the supporting plate and slidably engaging on the stem, a pin slidably arranged in the stem having engagement with the collar whereby the pin may be lifted when the plate is raised, spring means normally maintaining' the pin in engagement with one of the series of indentations, a spring engaging with the traveler, and means movable step by step along the rod and actuable by the plate when the latter moves downwardly for placing the spring under tension.

2. ln a saw filing machine, the combination of a file holder supporting plate, a feed rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod, a pin slidably mounted on the traveler having engagement with the plate whereby the pin may be lifted when the plate is raised, spring means normally maintaining the pin in engagement with one of the series of indentations, a spring engaging with the traveler, and means movable'step by step along the rod and actuable by the plate when the latterl is moved downwardly for placing the spring under tension.

3. In a saw filing machine, the combina-- tion of a file holder supporting frame, a rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod and being provided with a movable pin, means whereby the pin may be lifted when the plate is raised, 'resilient means tending to maintain the pin in engagement with one of the indentations, and means operable by the plate in moving downwardly for placing` the traveler under tension whereby when the pin is lifted, said traveler will be moved along the rod.

l. ln a saw filing machine, the combination of a. ile holder supporting frame, a rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod and being provided with a movable pin, means whereby the pin'may be lifted when the plate is raised, resilient means tending to maintain the pin in engagement with one of the series of indentations, a spring engaging with the traveler, and means operable by the plate when the klatter is moved downwardly for-placing the spring under tension.

5. In a saw filing machine, the combina tion of a file holder supporting frame, a rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod and being provided with a movable pin, means whereby the pin may be lifted when the plate is raised, resilient means tending to maintain the pin in engagement with one of the indentations, and means automatically operating to place the traveler under tension when the plate moves downwardly.

6. ln a saw filing machine, the combination of a file holder supporting plate, a `rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod and being provided with a movable pin normally engaging with one of the series of indentations and being operable when the said plate is raised to be moved out of engagement with the indentation, a block slidably mounted on the rod and provided with a spring controlled pawl adapted to engage the indentations for allowing movement of the block toward the traveler only, a bell crank lever pivotally mounted on the traveler and having one arm arranged beneath the plate, a link connecting the opposite arm of the bell crank lever with the block whereby to shift the block toward the traveler when the plate is lowered, a rod carried by the block having slidable engagement with the traveler, and a spring mounted on the rod and engaging .the travele adapted to be placed under tension when the block is moved toward the traveler. Y I y 7. ln a saw filing machine, the combination of a file holder supporting plate, a rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod and having a pin normally maintained in engagement with the series of indentations and operable by the plate when'the latter is moved upwardly for disengaging the indentations, a block slidably mounted on the rod and having means automatically coacting with the series of indentations for allowing movement of the .block only toward the traveler, means for shifting the block toward the traveler when the plate is moved downwardly, a rod carried by the block and having sliding engagement 'with the traveler, and a spring carried by the `rod engaging the traveler adapted, to be placed Vunder tension when the block is moved toward said traveler.

8. In a saw filing machine, the combination of a file holder supporting plate, a rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod provided with a pin no 'mally maintained in engagement with one of the indentations and adapted to be lifted out of engagement therewith when said plate is lifted, a block slidable on the rod and having means automatically coacting with the series of indentations to prevent movement of the block except towardy said traveler, means aetuable by the plate when the latter is moved downwardly for shifting the block toward the traveler, and means for placing the traveler under tension when said block is moved theretoward.

S). l'n a saw filing machine, the combination of a file holder supporting plate, a rod having a series of indentations extending longitudii'ially thereof, a traveler slidably mounted on the rod supporting the plate, means carried by the traveler coacting with the series of indentations for retaining the traveler againstlongitudinal movement when the plate is moving downwardly, said means being aetuable when the plate is moved upwardly for allowing longitudinal movement of the traveler, and means actuable by the plate as the latter moves downwardly for placing the traveler under tension, whereby when the plate is raised the traveler will be moved along the rod.

10. In a. saw filing machine, the combination of a movable file holder supporting frame, a rod having a series of indentations extending longitudinally thereof, a traveler slidably mounted on the rod supporting the plate, and spring tensioned means aetuable by the file holder for cooperating with the series of indentations for feeding the said ltraveler step by step along the rod as the plate is moved up and down.

11. In a saw filing machine, the combination with a supporting frame, and a movable file holder support mounted thereon, of spring tensioned means actuable by the file holder support for automatically feeding the same step by step along the frame.

12. A saw filing machine, including a supporting frame, a file holder support mounted thereon and movable up and down with the file holder7 and spring tensioned means aetuable by the file holder support as it moves up and down for feeding the same step by step along the supporting frame.

13. A saw filing machine including a file supporting device, and a rod on which the same is mounted, said rod being provided with a plurality of longitudinally extending series of indentations, the members of the various series being spaced various distances apart, and spring tensioned means adapted to cooperate with either of the series of in` dentations and aetuable by the file supporting device for feeding the latter step by step along the rod a distance each time equal to the distance between the adjacent indentations of the series.

14. A saw filing machine including a file supporting device, a rod on which the same is mounted, said rod being provided with a plurality of longitudinally extending series of indentations, the members of the various series being spaced at various distances apart, means adapted to cooperate with either of the series of indentations and with the file supporting device for feeding the latter step by step along the rod, and means for eccentrically mounting the rod whereby to automatically determine the proper' depth to which the file should operate according to the number of teeth occurring in a given length of saw.

15. In a saw iiling machine, the combination of a file supporting device, and an eccentrically mounted rod on which the supporting device is carried, and series of in dentations for determining the distance to which the file supporting` device should be moved between cuts according to the number of teeth in the saw, said series being so arranged circumferentially of the rod as that the latter will automatically determine the proper depth of cut when each series is in operation.

16. ln a saw iiling machine, the combination of a rod provided with a plurality of series of indentations adapted to determine the distances for feeding the le according to the number of teeth in various standard saws, said series being numbered, and an arm pivotally mounted on the machine and provided with a wheel adapted toroverlie the saw being sharpened, said wheel being provided with a series of pairs of teeth of various dimensions and numbered to correspond with the numbering of the series of indentations, said teeth adapted to be engaged with lsharpened teeth of the saw for properly determining the longitudinal adjustment of the saw blade relatively to the machine.

17. ln a saw filing machine, the combination with means for determining the distances for feeding the file according to the number of teeth in the saw being operated upon, of an arm pivotally mounted on the machine and provided with a rotatably mounted wheel, said wheel having a plurality of pairs of teeth of various dimensions and adapted to be engaged with sharpened teeth of the saw for properly determine ing the longitudinal adjustment of the saw relatively to the machine.

18. In a saw filing machine, the combination with means for feeding the file step by step at various distances according to the number of teeth in the saw being operated upon, of means engageable with sharpened teeth for properly determining the position of the saw longitudinally with respect to the machine.

19. A. saw iiling'machine including a base plate adapted to rest against an object and having a depending flange arranged at right angles to the base plate for engaging against the edge of the object, means for clamping the base plate onto the. object, standards carried by the base plate on which the saw liling mechanism is mounted, said standards being provided with vertically arranged recesses for receiving the saw blade and with horizontally arranged recesses having inclined floors, a bar having enlarged ends provided with inclined faces adapted to cooperate with the inclined oors of the horizontally arranged recesses to produce a cam action for moving the bar toward the base plate when such bar is shifted in one direction, and means for shifting the bar at will.

20.. A saw filing machine including a base plate, means for securing the same to an object, standards carried by the base plate on which. the saw filing device is mounted, means whereby a saw may be clamped against the base plate in a position to be operated upon by the saw filing device, and means carried by one of the standards in position to engage the saw for properly determining the position of the saw longitudinally with respect to the machine.

HJALMAR 1. HANSON.

Copies of this patent may 'be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

